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select count(*) from `table` where date>='2009-12-00' and date <='2009-12-31'

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select * from tablename where date_format(date,'%Y-%m')='2009-12';



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PHP code:

$date = '2009-12-25';
$ptn = '/([\d]{4})[- \/](0?[\d]|1[0-2])[-\/ ](0?[\d]|[1-2][\d]|3[0-1])/';
if (preg_match($ptn,$date,$out))
{
print_r($out);exit();
}
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